Isentropic compressibilities of solutions κS are readily calculated using the Newton–Laplace equation together with measured speeds of sound and densities. The result is an apparent molar isentropic compression for a given solute-j, ϕ(KSj; def) and a limiting property, ϕ(KSj; def)∞. This review examines the definition and calculation of ϕ(KSj; def) and ϕ(KSj; def)∞, commenting on the related isentropic expansions, ϕ(ESj; def) and ϕ(ESj; def)∞. We describe the thermodynamics which underpins the use of isentropic properties in the study of solute–solvent and solute–solute interactions.
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Blandamer et al. (2001) studied this question.
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